Note that Top Gear solicited two professional drivers to test the cars above and each car's best times are shown. This, like all tests, are very driver-dependent. Someone who's not familiar with a particular car, just isn't going to be as fast in it. As an example, the other driver of the NSX recorded a time of 8m 57.13... but this included a full 360 degree spin where the driver was quoted as saying he never had to take it out of second gear!

Quote from Orange F1LMI didnt see the Z06 in that list, is it there? think its 7:49....

Also, a modern F1 car did it in about 5:30, I think it was a Jag....anyone hear about that?

The Zo6 is on the list with 7:56 while the 5:39 is only an estimation based on a simulation, no m0dern F1 car ever lapped the Nordschleife, it is even prohibited by the owner of the track for safety reasons.